UPDATE: Another funny one on how they built this great stuff (though not the same, haha):

As we know that the Bird Nest (Beijing National Stadium) is a must-visit place in Beijing for the great Olympic Games 2008, there are also some funny pictures of it. Here I find one of them in Xiaonei.com:

I guess it's made by some Chinese farmers. The farmers in China are really of great creativity :)

FYI, more about the real Bird Nest Stadium (via Wikipedia)

The stadium can seat as many as 91,000 spectators during the Olympics. The capacity will then be reduced to 80,000 after the Games. It has replaced the original intended venue of the Guangdong Olympic Stadium.^[5] The stadium is 330 metres long by 220 metres wide, and is 69.2 metres tall. The stadium uses 258,000 square metres of space and has a usable area of 204,000 square metres. It was built with 36 km of unwrapped steel, with a combined weight of 45,000 tonnes.^[5] The stadium will cost up to 3.5 billion yuan (≈423 million USD).^[5]